Filter.



UNITED STATES Patented April 25, 1905.

PATENT GEEICE.

FILTER.

SPECIFICATION forming part of Letters Patent No. 788,145, dated April 25, 1905.

Application filed April 9, 1904. Serial No. 202,290.

To HU 707mm/ if 71am/ {P0/1.007%.'

Be it known that l, FREDERIC iV. FENDER- eas'r, a citizen of the United States, residing' at 'altham, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Filters, of which the following is a specification.

My invention relates to improvements in filters, and has Vfor its object the provision of a filter which may be readily and quickly cleaned without detaching the same from the water -supply pipe, which will thoroughly cleanse the water filtering' therethrough, and by reversing the current of the water passing through the water-filter the substances that may collect on the filtering-disk are washed away. This object is attained by a simple half-turn of the filter on its pivoted point, which in the example illustrated is the valve, and all back pressure on the faucet to which the filter is connected is avoided.

ln using the filter where it is desired to apply the same to the `faucets now in use the Vfaucet is first unscrewed from the water-pipe, the faucet removed, and the filter is connected at one side to the supply-pipe, and then the faucet is screwed to the other side of the filter, thus interposing the filter between the supply-pipe and the faucet, as shown b v dotted lines in Figure l.

My invention consists in certain novel features of construction and combinations and arrangement of parts, as hereinafter described, and pointed out in the claims.

In the drawings, Fig'. l is a perspective view of my device as applied to a faucet and su pplv-pipe, the faucet and supply-pipe being' shown in dotted lines. Fig'. Q is a view, partly in section, with the cover removed. Fig. 3 is a sectional view on hne 3 3, Fig. 2. Fig'. 4; is

a sectional view on line i 4, Fig'. 9.

The filter consists of a easing Yl, provided with a. handle 2, the detachable screw-threaded side piece 3 having' lugs 3 thereon for convenience in attaching` or detaching said side piece, and the filtering-disk ef, located in said casing' and held therein between the packing'- rings 5 and 6, and lugs 'T and 8 on the sides of the casing. The casting' is extended at its top, as at 9, and provided with a valve-seat I0, into which is fitted the tapered valve-plug' ll, having' outer screw-threads 1Q at its inner end and inner screw-threads i3 at its outer end for attachment to the supply-pipe and faucet, respectively, as illustrated in Fig. l. A partition 1l is located in the valve-plug' and divides said valve into two chambers. On the threads 13 are located two nuts la and l5 for tightening the filter'casingl on the valveplug. fashers ma)v also be interposed between the filter and pipes to make a close joint. The valve-plug is further provided with two ports 16 and 17 at each side of the partition 11', located on opposite sides of the plug, as shown in Fig. 4. lhe valve-seat10 is likewise provided with two ports 18 and 19, located diamctrically opposite each other and in the same plane, said ports leading, respectively, to passages 20 and 2.1 in the extended portion of the casing', and these ports 1S and 19 are as long as the distance between the top of the port 16 to the bottom of the port 1T in the valve-plug, so that whichever way the filter may be turned on the valve-plug' a pair of the different ports will register. As will be seen in Figs. 2 and 3, passage 2l opens to the near side of the disk and passage 20 opens to the far side of said disk. The valve-seat portion 9 is provided with two shoulders 22, located diametricallyY opposite cach other, which contact with a stop-pin 23, located on one end of the valve-plug, thus limiting the movement of the filter when turned by the handle and causing the filter to stop at just the right point in its revolution whichever way it may be turned.

The operation of the filter is as follows: iVith the handle pointing downward, as in position Figs. 1 and Q, the water flows through the left-hand port '18, through the chamber or passage 20 into the back part 2i of the filtercasing', and thence through the disk into the chamber 25 of the casing on the other side of the disk, up through the passage 2l, through the right-hand port 1T, and out through the faucet, all foreign substances having' been left behind as the water passed through the filtering-disk. To reverse the water-flow and clean otf the substances which may have been filtered onto the disk, turn the filter half-way around IOO on the valve-plug as a pivot, so that the handle is at the top, the movement being limited by the lugs 22 and pin 23. This movement forces the Water to pass through the valveport 17, valve-seat port 19, and passage 21 to the chamber 25, through the filtering-disk, chamber 24, passage 20, and port 18, thence through the valve-plug and faucet.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

l. The Combination with a casing, of a filter therein forming chambers, a screw-plate having a central lng thereon, a complementary lug on the casing at the opposite side of the filter for securing said filter, an extension at the top of the casing having a valve-seat with elongated ports, a stationary valve-plug with a transverse partition therein and ports arranged at each side of said partition out of alinement and adapted to registervwith said elongated ports, separate communication being established between said chambers and elongated ports, a pin on the valve-plug and a shoulder on the casing to limit the movement of the casing, and means whereby the bers separately with the elongated ports, a

handle integral with the casing, said casing being pivotally supported on the valve-plug and adapted to be rotated bodily to reverse the How of Water through the filter, a pin inV the valve-plug, and a shoulder on the casing to limit the movement of the easing.

1n testimony whereofl I aX my signature in presence of two Witnesses.

FREDERIC W. PENDERGAST.

Witnesses:

HOLLIS E. DENNEN, CARL W. SMITH. 

